html{
  height:100%;
  font-size:14px;
  line-height:14px;
  font-family: Helvetica Neue, Helvetica, PingFang SC, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;
  cursor: default;
  user-select:none;
}
body{
  height:100%;
}
#app {
  height:100%;
  box-sizing: border-box;
  position:relative;
}

.menu{
  position:absolute;
  border:1px solid rgb(78,78,78);
  border-radius: 5px;
  padding:2px 5px;
  background-color: rgb(38,38,38);
  color:#fff;
  left:0;top:0;
  width:160px;
  .item{
    line-height: 26px;
    margin:3px 0;
    border-radius: 5px;
    padding:0 10px;
    &:hover{
      background-color:rgb(22, 82, 177);
    }
  }
}